Electro-Voice sx80pipix eds ユーザーズマニュアル

The Sx80PI and Sx80PIX are continuations

of the popular Sx80 speaker offering the

added value of weather-resistant cabinets.

The Electro-Voice Sx80PI is a 175-watt,

compact, two-way, high-efficiency, constant-

directivity speaker system for permanent in-

stallation.  The Sx80PIX is the same as the

Sx80PI with the addition of an internal, 60-

watt line transformer with selectable taps.

This allows for easy connection to 70-volt or

100-volt speaker lines in distributed systems.

Through extensive use of computer-aided de-

sign and modeling, Electro-Voice engineers

have developed a state-of-the-art professional

loudspeaker system for permanent installation

where weather resistance is needed.

The high-frequency section of the Sx80PI

utilizes a molded-in 90° x 65° constant-di-

rectivity horn.  This unique pattern contrib-

utes to high intelligibility and aims the speak-

ers output where it is most useful.  Vocals

sound natural yet "cut through" in reverber-

ant, noisy rooms.  In addition, the coverage

pattern is unusually uniform over its range

of operation. The horn's unique, VariPath

TM

throat geometry helps direct driver output to

the corners of the room, to points of cover-

age not described in the usual specifications

of horizontal and vertical coverage angles,

and to parts of the audience that typically do

not receive the strongest coverage.

One of the many other unique features of the

Sx80PI is the cabinet.  Constructed of high-

impact polystyrene it provides a stiff and

extremely durable enclosure.  The cabinet

includes M6 threaded inserts for the optional

Sx80MB U-bracket.

It also has inserts for installing with an

OmniMount

®

 Series 75 mounting system.

The Sx80PI’s high-frequency horn is driven

by the DH2005 one-inch throat, wide-band-

width, titanium-diaphragm driver.  This

driver uses a unique, convex-drive Time

Path™ phasing plug structure (U.S. Patent

#4,525,604) for smooth and extended high-

frequency performance.  The voice coil is

coupled to the diaphragm with EV’s exclu-

sive Resonant Drive™ Technology.  This in-

creases and smooths the high-frequency re-

sponse and reduces the amount of internal

equalization required for flat frequency re-

sponse, which extends to 20,000 Hz.

A self-resetting high-frequency protection

circuit, EV’s PRO™ circuit, is included with

the Sx80PI to prevent against accidental

overdrive and improve system reliability.  If

the input power to the high-frequency driver

exceeds the nominal rating, the protection

circuit is activated and reduces the power

delivered to the driver by 6 dB.  The system

will remain in this mode of operation until the

input power is reduced to a safe level.

The low-frequency section of the Sx80PI is a

203-mm (8-in.) direct radiating woofer in-

stalled in an optimally-vented enclosure.  This

results in exceptionally extended bass response

and high efficiency in a very small cabinet.

™

The Sx80PI controls both acoustical and me-

chanical ring modes to provide dramatically

increased intelligibility, using techniques

learned from the development of the

Electro-Voice X-array™ concert speakers.

There is much less coloration of the sound

from resonating sources, leaving only the in-

tended sound to be heard by the audience.

The Sx80PI crossover includes the Electro-

Voice automatically resetting PRO™

 

circuit

for high-frequency driver protection.  This

circuit permits short-term transients to pass,